96128 is a Republican stronghold. About 10% of voters here vote Democratic and 90% Republican.
About 79% of adults in 96128 typically vote, above the U.S. average of about 62%. Among adults in 96128, ~8% vote Democratic, ~71% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How 96128 compares
Among zip codes within 15 miles, 96128 is the most Republican-leaning.
96128 runs about 100 points more Republican than California as a whole. California leans Democratic overall, while 96128 is one of the few Republican-leaning pockets.
Why 96128 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 96128, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 12% of adults in 96128 hold a bachelor's degree, about 22 points below the California average of 35%. Rural areas vote Republican, and 96128 sits in the bottom quarter on density (about 2%, below 95% of zip codes). 96128 runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; 96128, CA sits in the bottom tenth nationally on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 96128 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 96128 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 46%, about 16 points below the California average of 62%. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from California Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.